Roller bearing cage and manufacturing method thereof

Abstract

An object of the present invention is to provide a roller bearing cage suited in particular to a supersized roller bearing, wherein the cage ( 1 A) is configured such that a pair of ring parts ( 4 and 6 ) axially separated is connected by a plurality of column parts ( 5 ) sliding on an outer peripheral surfaces of rollers (RA), and a plurality of pocket holes (P) is evenly formed in a circumferential direction to store and hold the rollers (RA) at a peripheral wall portion, wherein a base body ( 2 ) including one ring part ( 4 ) and the column parts ( 5 ) with engagement convexes ( 5 A) at leading ends thereof and a connection body ( 3 ) including the other ring part ( 6 ) with engagement concaves ( 6 A) for engagement with the engagement convexes ( 5 A) of the column parts ( 5 ) are set as separate members.

1 . (canceled) 
     
     
         2 . (canceled) 
     
     
         3 . (canceled) 
     
     
         4 . A manufacturing method of a roller bearing cage, the cage being configured such that a pair of ring parts axially separated is connected by a plurality of column parts sliding on an outer peripheral surface of a roller as a rolling element, and a plurality of pocket holes is evenly formed in a circumferential direction to store and hold the roller at a peripheral wall portion, wherein the manufacturing method comprises:
 a base body blank cutting step of cutting a steel plate so as to protrude portions to be the column parts outward in a radial direction from an outer peripheral portion of a disc-shaped member with a central hole and form engagement convexes at leading ends of the portions to be the column parts, thereby to obtain a base body blank;   a folding step of folding the portions to be the column parts in the base body blank along the outer peripheral portion of the disc-shaped member;   a connection body blank cutting step of cutting a steel plate so as to form engagement concaves evenly in the circumferential direction in an annular ring part for engagement with the engagement convexes, thereby to obtain a connection body blank;   a joining and fixing step of joining and fixing the base body and the connection body while the engagement convexes of the base body formed from the base body blank are engaged with the engagement concaves of the connection body formed from the connection body blank;   a surface pressing step of surface-pressing the portions to be the column parts to form and finish contact surfaces with respect to the roller as predetermined inclined surfaces, the surface pressing step being performed after the base body blank cutting step or the folding step; and   an inner-diameter removing step of removing an excessive thick portion of an inner-diameter portion of the disc-shaped member to meet a desired inner diameter, the inner-diameter removing step being performed after the folding step in the case where the surface pressing step is performed after the base body blank cutting step, or being performed after the surface pressing step in the case where the surface pressing step is performed after the folding step, or being performed after the joining and fixing step.   
     
     
         5 . A manufacturing method of a roller bearing cage, the cage being configured such that a pair of ring parts axially separated is connected by a plurality of column parts sliding on an outer peripheral surface of a roller as a rolling element, and a plurality of pocket holes is evenly formed in a circumferential direction to store and hold the roller at a peripheral wall portion, wherein the manufacturing method comprises:
 a base body constitutional blank cutting step of cutting a steel plate so as to protrude the portions to be the column parts outward in a radial direction from an outer peripheral portion of a plurality of fan-shaped divided plates obtained by dividing a disc-shaped member having a central hole evenly in the circumferential direction, and form engagement convexes at leading ends of the portions to be the column parts, thereby to obtain a plurality of base body constitutional blanks constituting a base body;   a folding step of folding the portions to be the column parts in the base body constitutional blanks along the outer peripheral portion of the fan-shaped divided plates;   a base body constitutional blank joining step of joining the fan-shaped divided plates in the plurality of the base body constitutional blanks with the folded portions to be the column parts into the shape of the disc-shaped member, thereby to obtain an integrated base body constitutional blank joint body;   a connection body constitutional blank cutting step of cutting a steel plate so as to divide an annular ring part evenly in the circumferential direction, thereby to obtain a plurality of connection body constitutional blanks constituting a connection body;   a connection body constitutional blank joining step of joining the plurality of the connection body constitutional blanks into an annular ring shape, thereby to obtain an integrated connection body constitutional blank joint body;   an engagement concave forming step of forming engagement concaves evenly in the circumferential direction in the connection body constitutional blank joint body for engagement with the engagement convexes;   a joining and fixing step of joining and fixing the base body and the connection body while the engagement convexes of the base body formed from the base body constitutional blank joint body are engaged with the engagement concaves of the connection body formed from the connection body constitutional blank joint body;   a surface pressing step of surface-pressing the portions to be the column parts to form and finish contact surfaces with respect to the roller as predetermined inclined surfaces, the surface pressing step being performed after the base body constitutional blank cutting step or the folding step; and   an inner-diameter removing step of removing an excessive thick portion of an inner-diameter portion of the disc-shaped member to meet a desired inner diameter, the inner-diameter removing step being performed after the folding step in the case where the surface pressing step is performed after the base body constitutional blank cutting step, or being performed after the surface pressing step in the case where the surface pressing step is performed after the folding step, or being performed after the joining and fixing step.   
     
     
         6 . A manufacturing method of a roller bearing cage, the cage being configured such that a pair of ring parts axially separated is connected by a plurality of column parts sliding on an outer peripheral surface of a roller as a rolling element, and a plurality of pocket holes is evenly formed in a circumferential direction to store and hold the roller at a peripheral wall portion, wherein the manufacturing method comprises:
 a base body blank cutting step of cutting a steel plate so as to protrude portions to be the column parts outward in a radial direction from an outer peripheral portion of a disc-shaped member with a central hole and form engagement convexes at leading ends of the portions to be the column parts, thereby to obtain a base body blank;   a folding step of folding the portions to be the column parts in the base body blank along the outer peripheral portion of the disc-shaped member;   a connection body blank cutting step of cutting a steel plate so as to form engagement concaves evenly in the circumferential direction in an annular ring part for engagement with the engagement convexes, thereby to obtain a connection body blank;   a joining and fixing step of joining and fixing the base body and the connection body while the engagement convexes of the base body formed from the base body blank are engaged with the engagement concaves of the connection body formed from the connection body blank;   a rough surface pressing step of surface-pressing the portions to be the column parts to form the contact surfaces with respect to the roller by a surface press amount smaller than a final surface press amount, the rough surface pressing step being performed after the base body blank cutting step or the folding step, or a laser-cut inclined surface forming step of forming by laser cut inclined surfaces equivalent to the inclined surfaces formed at the rough surface pressing step, the laser-cut inclined surface forming step being performed in the course of the base body blank cutting step or after the base body blank cutting step;   a finished surface pressing step of surface-pressing the column parts to form the contact surfaces with respect to the roller by the final surface press amount, the finished surface pressing step being performed after the joining and fixing step; and   an inner-diameter removing step of removing an excessive thick portion of an inner-diameter portion of the disc-shaped member with the central hole in the base body to meet a desired inner diameter.   
     
     
         7 . A manufacturing method of a roller bearing cage, the cage being configured such that a pair of ring parts axially separated is connected by a plurality of column parts sliding on an outer peripheral surface of a roller as a rolling element, and a plurality of pocket holes is evenly formed in a circumferential direction to store and hold the roller at a peripheral wall portion, wherein the manufacturing method comprises:
 a base body blank cutting step of cutting a steel plate so as to protrude portions to be the column parts inward in a radial direction from an inner peripheral portion of an annular ring-shaped member and form engagement convexes at leading ends of the portions to be the column parts, thereby to obtain a base body blank;   a folding step of folding the portions to be the column parts in the base body blank along the inner peripheral portion of the annular ring-shaped member;   a connection body blank cutting step of cutting a steel plate so as to form engagement concaves evenly in the circumferential direction in an annular ring part for engagement with the engagement convexes, thereby to obtain a connection body blank;   a joining and fixing step of joining and fixing the base body and the connection body while the engagement convexes of the base body formed from the base body blank are engaged with the engagement concaves of the connection body formed from the connection body blank; and   a surface pressing step of surface-pressing the portions to be the column parts to form and finish contact surfaces with respect to the roller as predetermined inclined surfaces, the surface pressing step being performed after the base body blank cutting step or the folding step.   
     
     
         8 . A manufacturing method of a roller bearing cage, the cage being configured such that a pair of ring parts axially separated is connected by a plurality of column parts sliding on an outer peripheral surface of a roller as a rolling element, and a plurality of pocket holes is evenly formed in a circumferential direction to store and hold the roller at a peripheral wall portion, wherein the manufacturing method comprises:
 a base body constitutional blank cutting step of cutting a steel plate so as to protrude the portions to be the column parts inward in a radial direction from an inner peripheral portion of a plurality of arc-shaped divided plates obtained by dividing an annular ring-shaped member evenly in the circumferential direction, and form engagement convexes at leading ends of the portions to be the column parts, thereby to obtain a plurality of base body constitutional blanks constituting a base body;   a folding step of folding the portions to be the column parts in the base body constitutional blanks along the inner peripheral portion of the arc-shaped divided plates;   a base body constitutional blank joining step of joining the arc-shaped divided plates in the plurality of the base body constitutional blanks with the folded portions to be the column parts into the shape of the annular ring-shaped member, thereby to obtain an integrated base body constitutional blank joint body;   a connection body constitutional blank cutting step of cutting a steel plate so as to divide an annular ring part evenly in the circumferential direction, thereby to obtain a plurality of connection body constitutional blanks constituting a connection body;   a connection body constitutional blank joining step of joining the plurality of connection body constitutional blanks into the annular ring shape, thereby to obtain an integrated connection body constitutional blank joint body;   an engagement concave forming step of forming engagement concaves evenly in the circumferential direction in the connection body constitutional blank joint body for engagement with the engagement convexes;   a joining and fixing step of joining and fixing the base body and the connection body while the engagement convexes of the base body formed from the base body constitutional blank joint body are engaged with the engagement concaves of the connection body formed from the connection body constitutional blank joint body; and   a surface pressing step of surface-pressing the portions to be the column parts to form and finish contact surfaces with respect to the roller as predetermined inclined surfaces, the surface pressing step being performed after the base body constitutional blank cutting step or the folding step.   
     
     
         9 . A manufacturing method of a roller bearing cage, the cage being configured such that a pair of ring parts axially separated is connected by a plurality of column parts sliding on an outer peripheral surface of a roller as a rolling element, and a plurality of pocket holes is evenly formed in a circumferential direction to store and hold the roller at a peripheral wall portion, wherein the manufacturing method comprises:
 a base body blank cutting step of cutting a steel plate so as to protrude portions to be the column parts inward in a radial direction from an inner peripheral portion of an annular ring-shaped member and form engagement convexes at leading ends of the portions to be the column parts, thereby to obtain a base body blank;   a folding step of folding the portions to be the column parts in the base body blank along the inner peripheral portion of the annular ring-shaped member;   a connection body blank cutting step of cutting a steel plate so as to form engagement concaves evenly in the circumferential direction in an annular ring part for engagement with the engagement convexes, thereby to obtain a connection body blank;   a joining and fixing step of joining and fixing the base body and the connection body while the engagement convexes of the base body formed from the base body blank are engaged with the engagement concaves of the connection body formed from the connection body blank;   a rough surface pressing step of surface-pressing the portions to be the column parts to form contact surfaces with respect to the roller by a surface press amount smaller than a final surface press amount, the rough surface pressing step being performed after the base body blank cutting step or the folding step, or a laser-cut inclined surface forming step of forming by laser cut inclined surfaces equivalent to the inclined surfaces formed at the rough surface pressing step, the laser-cut inclined surface forming step being performed in the course of the base body blank cutting step or after the base body blank cutting step; and   a finished surface pressing step of surface-pressing the column parts to form the contact surfaces with respect to the roller by the final surface press amount, the finished surface pressing step being performed after the joining and fixing step.   
     
     
         10 . The manufacturing method of a roller bearing cage according to  claim 4 , wherein
 the roller is a conical roller or a spherical roller, and   
       the manufacturing method comprises a shaping step of forming the connection body blank or the connection body constitutional blank joint body in a disc-spring shape so as to be orthogonal to the column parts of the base body. 
     
     
         11 . The manufacturing method of a roller bearing cage according to  claim 5 , wherein
 the roller is a conical roller or a spherical roller, and   
       the manufacturing method comprises a shaping step of forming the connection body blank or the connection body constitutional blank joint body in a disc-spring shape so as to be orthogonal to the column parts of the base body. 
     
     
         12 . The manufacturing method of a roller bearing cage according to  claim 6 , wherein
 the roller is a conical roller or a spherical roller, and   
       the manufacturing method comprises a shaping step of forming the connection body blank or the connection body constitutional blank joint body in a disc-spring shape so as to be orthogonal to the column parts of the base body. 
     
     
         13 . The manufacturing method of a roller bearing cage according to  claim 7 , wherein
 the roller is a conical roller or a spherical roller, and   
       the manufacturing method comprises a shaping step of forming the connection body blank or the connection body constitutional blank joint body in a disc-spring shape so as to be orthogonal to the column parts of the base body. 
     
     
         14 . The manufacturing method of a roller bearing cage according to  claim 8 , wherein
 the roller is a conical roller or a spherical roller, and   
       the manufacturing method comprises a shaping step of forming the connection body blank or the connection body constitutional blank joint body in a disc-spring shape so as to be orthogonal to the column parts of the base body. 
     
     
         15 . The manufacturing method of a roller bearing cage according to  claim 9 , wherein
 the roller is a conical roller or a spherical roller, and   the manufacturing method comprises a shaping step of forming the connection body blank or the connection body constitutional blank joint body in a disc-spring shape so as to be orthogonal to the column parts of the base body.